---
id: "string-concatenation"
keywords: ["concat", "concatenation", "add", "string"]
name: "++"
summary: "This is the `string concatenation` operator."
category: "operators"
---

This operator concatenates two _strings_ together.

<CodeTab labels={["ReScript", "JS Output"]}>

```res
let greetings = "Hello " ++ "world!"
```

```js
var greetings = "Hello world!";
```

</CodeTab>
